This link may be helpful http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2000935
On May 24, 2012, at 5:32 PM, Alexander Patterson <alexander.patter...@csueastbay.edu> wrote: > I'm not sure from what I have been reading, might want to contact your > VMware Rep and see what they can do if you plan on upgrading to 5. > > WIth ESXI 4.1 > > Infrastructure limitations > Some limitations in ESX Server 4 may constrain the design of data centers: > Guest system maximum RAM: 255 GB > Host system maximum RAM: 1 TB[ > Number of hosts in a high availability cluster: 32 > Number of Primary Nodes in ESX Cluster high availability: 5 > Number of hosts in a Distributed Resource Scheduler cluster: 32 > Maximum number of processors per virtual machine: 8 > Maximum number of processors per host: 160 > Maximum number of cores per processor: 12 > Maximum number of virtual machines per host: 320 > VMFS-3 limits files to 262,144 (218) blocks, which translates to 256 > GB for 1 MB block sizes (the default) or up to 2 TB for 8 MB block > sizes.However, on a VMFS Boot drive, it is usually very difficult to > use anything other than 1 MB Block size > > With ESXI 5 there has been some changes to these limits > Guest system maximum RAM: 1 TB > Host system maximum RAM: 2 TB > Number of hosts in a high availability cluster: 32 > Maximum number of processors per virtual machine: 32 > Maximum number of processors per host: 160 > Maximum number of cores per processor: 25 > Maximum number of virtual machines per host: 512 > VMFS-3 is supported and has the same limits as before > VMFS-5 however has a max volume size of 64 TB and a max file size of 2 > TB - 512 B > How much vRAM does a VMware vSphere Hypervisor license provide? > vSphere Hypervisor license provides a vRAM entitlement of 32GB per > server, regardless of the number of physical processors. vSphere > Hypervisor can be used on servers with maximum physical RAM capacity > of 32GB. > > On Thu, May 24, 2012 at 2:20 PM, Sanders, Arbin D <asand...@nccu.edu> wrote: >> Alexander, >> >> What if I use the paid version of vSphere5? And I have 96 GB of memory? >> Could I get more than 20 VMs? >> >> Arbin Darren Sanders >> >> IT Manager - Academic Computing >> North Carolina Central University >> 712 Cecil Street >> Suite 3014 >> Durham, NC 27707 >> 919.530.6307 >> 919.530.5097 (Fax) >> >> For the Latest ITS Updates and Tips Join Us Online >> >> CONFIDENTIALITY: This email (including any attachments) may contain >> confidential, proprietary and privileged information, and unauthorized >> disclosure or use is prohibited. If you received this email in error, please >> notify the sender and delete this e-mail from your system. >> >> >> -----Original Message----- >> From: Alexander Patterson [mailto:alexander.patter...@csueastbay.edu] >> Sent: Thursday, May 24, 2012 5:17 PM >> To: vcl-...@incubator.apache.org >> Cc: vcl-user@incubator.apache.org >> Subject: Re: Max Number of VMs per Host >> >> Hello, >> >> ESXI 5 is limit by licenses with the amount of ram you can run on each >> machine. >> The 8 GB vRAM limit is for the upcoming 5.0 free Hypervisor, the 4.x version >> had no such memory limits. >> VM makes you pay now if you want to use X amount of ram per host with the >> upcoming version. >> >> Making 4.1 I Free Version a much more attractive option to go with >> >> We have each of our blades running ESXI 4.1 with 16 Cores and 48 GB of ram >> and we have 20 VM's per blade but we give 1.5 GB of ram to each VM. >> >> More info here >> http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1014006 >> >> -Alex >> >> On Thu, May 24, 2012 at 2:09 PM, Sanders, Arbin D <asand...@nccu.edu> wrote: >>> >>> I am planning on using a free version of vSphere 5 depending on the how >>> many VMs I can get. I would like to get 50 VMs per host. >>> >>> >>> >>> Arbin Darren Sanders >>> >>> >>> >>> IT Manager - Academic Computing >>> >>> North Carolina Central University >>> >>> 712 Cecil Street >>> >>> Suite 3014 >>> >>> Durham, NC 27707 >>> >>> 919.530.6307 >>> >>> 919.530.5097 (Fax) >>> >>> >>> >>> For the Latest ITS Updates and Tips Join Us Online >>> >>> >>> >>> CONFIDENTIALITY: This email (including any attachments) may contain >>> confidential, proprietary and privileged information, and unauthorized >>> disclosure or use is prohibited. If you received this email in error, >>> please notify the sender and delete this e-mail from your system. >>> >>> >>> >>> From: Dmitri Chebotarov [mailto:dcheb...@gmu.edu] >>> Sent: Thursday, May 24, 2012 12:01 PM >>> To: vcl-...@incubator.apache.org >>> Cc: vcl-user@incubator.apache.org >>> >>> >>> Subject: Re: Max Number of VMs per Host >>> >>> >>> >>> Here is some info: >>> >>> >>> >>> http://myvirtualcloud.net/?p=1155 >>> >>> >>> >>> This is for VMware View which could be approximated to VCL. >>> >>> >>> >>> There is also limits per VMFS datastore (if you not using NFS). >>> >>> I have seen different recommendations for VM number per ESXi host per >>> shared VMFS - VMWare recommends 16 VMs per Host for shared VMFS for VMFS-v3. >>> >>> >>> >>> What hypervisor do use for VCL? >>> >>> >>> >>> Thanks. >>> >>> >>> >>> >>> -- >>> >>> Thank you, >>> >>> >>> >>> Dmitri Chebotarov >>> >>> Virtual Computing Lab Systems Engineer, TSD - Ent Servers & Messaging >>> >>> 223 Aquia Building, Ffx, MSN: 1B5 >>> Phone: (703) 993-6175 >>> >>> Fax: (703) 993-3404 >>> >>> >>> >>> On Thursday, May 24, 2012 at 11:42 , Young h Oh wrote: >>> >>> Normally, you can calculate the average number of VMs depends on the >>> computing power (CPU). For example, 1 physical core can supports 2 VMs with >>> 2 GB RAM. If you have 2 CPUs with 16 cores, then you might run 32VMs with >>> 64GB RAM. However, the max number of VMs per host depends on variable >>> facts as Al Quiros mentioned, In addition to Al's comments, you might also >>> consider the application you want to run on guest VMs. If applications are >>> more computation intensive, the number of CPUs would be important fact to >>> decide the max number of VMs per host. >>> >>> In our environment, we don't use VMware but running RHEL 6 x64 with KVM >>> on IBM blade hosts with 16 CPUs and 24GB RAM. We run average 15 Windows XP >>> VMs with 1GB memory without much performance overhead. However, we can run >>> up to 22 VMs but the performance was not good. >>> >>> Best regards, >>> -------------------------------------------------------------------- >>> Young Hyun Oh >>> IBM Tivoli >>> >>> Evelio Quiros ---05/24/2012 10:58:12 AM---Hello, As you know, the >>> number of Virtual Machines per host depends on available resources >>> (CPU, RAM >>> >>> From: Evelio Quiros <evq...@fiu.edu> >>> To: "vcl-user@incubator.apache.org" <vcl-user@incubator.apache.org>, >>> "'vcl-...@incubator.apache.org'" <vcl-...@incubator.apache.org>, >>> Date: 05/24/2012 10:58 AM >>> Subject: Re: Max Number of VMs per Host >>> >>> ________________________________ >>> >>> >>> >>> >>> Hello, >>> >>> As you know, the number of Virtual Machines per host depends on available >>> resources (CPU, RAM, Disk), as well as the demands of the image. >>> As a general guide, I have found the following to be reasonable. Other >>> admins, please share your opinions. >>> >>> For a single VM host with 12 virtual CPU and 98 GB RAM, I typically >>> allocate 25 Windows VM. When necessary, I have raised it to 32 Windows XP >>> machines. For linux based images, I have used 50 VM without issues. Monitor >>> the performance tab on your vSphere client to see if the host is >>> over-worked. >>> On Virtual Machines that require higher performance, I usually will not >>> place them on a host with more than 10 working VM. But the most important >>> thing is to watch the performance closely. You will get a feel for how many >>> VM per host by experience. >>> As always, your mileage may vary. >>> >>> Regards, >>> Al Quiros >>> Florida International University >>> >>> >>> From: <Sanders>, Arbin D <asand...@nccu.edu >>>> >>> Reply-To: "vcl-user@incubator.apache.org" >>> <vcl-user@incubator.apache.org> >>> >>> Date: Wednesday, May 23, 2012 3:53 PM >>> >>> To: "'vcl-...@incubator.apache.org'" <vcl-...@incubator.apache.org>, >>> "'vcl-user@incubator.apache.org'" <vcl-user@incubator.apache.org> >>> >>> Subject: Max Number of VMs per Host >>> >>> >>> All, >>> >>> What is the number of VMs do you all run per VMware host? Is it limited to >>> the RAM limitation for vSphere 5? How many purchase vSphere licenses? >>> >>> Arbin Darren Sanders >>> >>> IT Manager - Academic Computing >>> North Carolina Central University >>> 712 Cecil Street >>> Suite 3014 >>> Durham, NC 27707 >>> 919.530.6307 >>> 919.530.5097 (Fax) >>> >>> For the Latest ITS Updates and Tips Join Us Online >>> >>> CONFIDENTIALITY: This email (including any attachments) may contain >>> confidential, proprietary and privileged information, and unauthorized >>> disclosure or use is prohibited. If you received this email in error, >>> please notify the sender and delete this e-mail from your system. >>> >>> >>> >>> ______________________________________________________________________ >>> This email has been scanned by the Symantec Email Security.cloud service. >>> For more information please visit http://www.symanteccloud.com >>> >>> ______________________________________________________________________ >>> >>> >>> >>> >>> ______________________________________________________________________ >>> This email has been scanned by the Symantec Email Security.cloud service. >>> For more information please visit http://www.symanteccloud.com >>> ______________________________________________________________________ >>> >>> >>> ______________________________________________________________________ >>> This email has been scanned by the Symantec Email Security.cloud service. >>> For more information please visit http://www.symanteccloud.com >>> ______________________________________________________________________ >> >> >> >> >> -- >> Thanks, >> Alex Patterson >> User Support Services >> Operating System Analyst >> California State University, East Bay >> >> ______________________________________________________________________ >> This email has been scanned by the Symantec Email Security.cloud service. >> For more information please visit http://www.symanteccloud.com >> ______________________________________________________________________ >> >> ______________________________________________________________________ >> This email has been scanned by the Symantec Email Security.cloud service. >> For more information please visit http://www.symanteccloud.com >> ______________________________________________________________________ > > > > -- > Thanks, > Alex Patterson > User Support Services > Operating System Analyst > California State University, East Bay
